Stackable paper tray



FIG. 1 is a front elevational view of a stackable paper tray showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a top plan view;

FIG. 4 is a right side elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a rear elevational view; and,

FIG. 7 is a front perspective view thereof. 

The ornamental design for a stackable paper tray, as shown. 